Hand tool



R. D. KOHNE Jan. 1 4

HAND TOOL Filed March 14 1921 ATTDHNE Y llaitented Jan. 1, 1924.

ROBERT D. KOI-INE, OF TOLEDO, OHIO.

HAND TOOL.

Application fi1ec1 March 14, 1921.

T0 all 207mm z't mag concewn:

Be it known that I, ROBERT D. KOHNE, a citizen of the Unitecl States of America, residing a1: Toleclo, Lucas County, Ohio, have inventecl new ancl useful Hand Tools, 01: which the following is a specification.

This invention relates t0 tool holding ancl operating devices.

This invention has utility when incorpo rated in bi1: ancl clrill hancl tools.

Referring to the clrawings:

' Fig. 1 is a sicle elevat-ion of an einbodiment 0f the invention in the form of a brace;

Fig. 2 is a view, with parts broken away of the tool holding stem 01 clutch;

Fig. 3 is a bottom plan of the stem 01 Fig. 2;

Fig. 4 is a section on the line 44, Fig. 2; and

Fig. 5 is a detail view 01 the acljustalole spline for 13he chuck.

The device is shovvn as comprising a handle 1 mounted on arm 2, to which, by spring clog 3, is conneotecl handle 4 011 stem 5 which encls in a heacl 6 engagecl by holt 8 130 C011- nect arm element 10 therewith. Strap spring 11 terminating in beacls 12 holcls the handle 4 in braoe position. Pin 15 may be clepressecl to releasethe handle 4. Bolts 16 mount a pair of dogs 17 acljacent ratche1; 18. A second arm element 24 is assemblecl with the element 10.

The ratohet 18, has an upper cylinclrieal bearing extension 26 engagecl by the element 24, While an opposite cylindrical bearing extension 27 from below the ratchet 18 is engagecl by the element 10. The ratohet 18 has formecl therethrough a square hole in which may be insertecl, ancl thus keyecl to rotate therewith, a square ste1n 29. Pin 30 assembles the stem 29 with the ratchet 18. Adjacent the portion 27, 1;he member 29 has a so1newhat larger threaded portion 31 npon whioh is mountecl a 111113 32. This nut 32 has an opening in whioh may be inserted a closure sorew 33. Upon remoVal of this closure screw 33 pin 34 may be insertecl to pass through opposing slots 35 in the threacled portion 31 and to pass through opening36 in head 37 of tapered spline 38. The ende of the pin 34 in 1:his position extencl into groove 39 in the nut 32' so that rotation 0f this nut embracing 1;he threaclecl portion 31 may shift the pin 34 axially 0:E

Seria1 N0. 451,993.

the ste1n 29, ancl simultaneously positively' 1nove the spline 38. When this operation 0f t-he 111113 32 is in a clireotion 130 clraw the spline 38 into the stem 29, the movement of the spline 38 in the way 40 throws this spline 38 130 engage shank 42 01 13001 01 (l1'ill There is accordingly proviclecl a simple devioe f01' positively locking a tool in a driving ancl holzling ste1n.

The rbtation 01 the nut 32 in the opposite clireetion may release 1;he spline 1:101n holding position as to the shank ancl simultaneously serve as a positive ejeccion clevice for the tool. The stem 29 has in ics upper sec tion a threaclecl opening 44 in which may be insertecl a threalecl pin 45, the rotation of Which pin outwarcl from the stem 29 against a braoket (olcl man) er other holding means, may cause this to operate as a feecling clevice for the tool.

This mechanism is one having a compaet simple chuclz with a ratchet b1aoe 01 driving arm reaclily convertible, giving this, as a tool, clesirable features of utility.

What is claimed ancl it is clesirecl 130 secure loy Unitecl Siates Letters Patent is 1. A tool holder shaft proviclecl with an external noncircular portion 1:0r effecting enga ement thereof for driving rotation,

2LI1Fl a concentrio Socket for directly receiving a cylindrical shank 01 a tool having a flat sicle, said socket being providecl wich a key way opposing said flat sicle, a spline having a heacl, locatecl inwarclly of the 19001 shank, and means exterior 01 1zhe holder shaftro1;atahle as to the shaft 1E01 a(lji1Sing the heacl ancl for bringing l7l1 spline into bincling engagement Wi1;h bhe flat side o1? 1;-he tool shank.

2. In a tool holder, a shaft having a Socket f0r clirectly engaging a 11001 shank for coaxial rotation with saicl shaft, saicl Socket having a spline way, a spline having a head registeringr in saicl s0okea, ring n1eans rotatable exteriorly 01' the shaft, and a pin eoacting Wibh the spline head ancl the 1ing means for shifting the spline whereby a 1001 shank n1ay be held clirectly against said shaft in salcl socket.

3. A mounting for a 17001 emboclying a weclge spline providecl With a heacl, saiel spline tapering to have its thicker weclge portion away from the heacl, a socket having a spline way in whioh saicl head serves to position the sp1ine by the head registering Wibh saicl Socket, said head having a, way therethrough, a pin in said way protruding exteriorly of the socket, said socket being externally threaded, and a ring on said threaded portion of the socket ancl having an annular groove for receiving the pro truding portions of the pin, whereby the ring may rotate independently of the pin, but in the travel 0f the ring axiz1fly of the Socket may engage the pin and thereby effect 10 shifting 0f the spline int0 -or out 0f anchoring position with atool in the socket.

l In witness Whereof I aflix Iny signature.

ROBERT D. KOHNE. 

